moxi is a memcached with integrated proxy with several features that can help keep the memcached contract whole in complicated environments. It also brings several optimizations to memcached deployments, without requiring any changes to the application software using memcached.

phpCacheAdmin is a Web application for administrating and debugging Memcached. It allows you to delete or view the current contents of the server and specify the output cache time. It also has the potential to be expanded to xDebug, FileCache, radishes, and other types of caches.

HybridCache is a PHP package for managing a cache with the data storage abstracted. Internally, the storage media is used as a key/value dictionary, but any other method can be adapted (e.g., SQLite), and many different methods can be used in the same instance.

appserver.io is a multithreaded application server for PHP. Applications can be installed using drag and drop. It has outstanding performance, with benchmarking on nginx showing that it is about 50% faster than nginx alone (based on a standard Magento installation) with no additional tweaks.